MPI4040R1-2R2-R Equivalent & Substitute Parts

Part Overview

The MPI4040R1-2R2-R is a 2.2 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 2.6 A continuous current with 80 mOhm DC resistance and operates across the temperature range of -55°C to 125°C. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility within the specified electrical and mechanical parameters.

Key Parameters

Parameter	Value
Inductance	2.2 µH
Inductance Tolerance	±20%
Current Rating	2.6 A
DC Resistance (DCR)	80 mOhm
Shielding	Shielded
Core Type	Drum Core, Wirewound
Mounting Type	Surface Mount
Operating Temperature	-55°C to 125°C
Package / Case	1816 (4540 Metric)
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MPI4040R1-2R2-R are selected based on strict electrical and mechanical compatibility criteria. The following parameters must align with the main part specifications:

Critical Matching Parameters:

Inductance value: 2.2 µH with ±20% tolerance
Shielding: Shielded configuration required
Core type: Drum core wirewound construction
Mounting type: Surface mount
Operating temperature range: Minimum -55°C to 125°C coverage
Inductance test frequency: 100 kHz

Allowable Variation Parameters:

Current rating: Substitute parts must equal or exceed 2.6 A
DC resistance: Substitute parts must not exceed 80 mOhm maximum
Package dimensions: Physical compatibility with 1816 (4540 Metric) footprint or equivalent
Moisture sensitivity: MSL 1 classification maintained

Three active substitute parts meet these criteria and are available from manufacturers with established product status and compliance certifications.

Parameter Comparison

Parameter	MPI4040R1-2R2-R (Main)	MPI4012V2-2R2-R	B82472G6222M000	SRP4012TA-2R2M
Manufacturer	Eaton - Electronics Division	Eaton - Electronics Division	EPCOS - TDK Electronics	Bourns Inc.
Product Status	Obsolete	Active	Active	Active
Inductance	2.2 µH	2.2 µH	2.2 µH	2.2 µH
Inductance Tolerance	±20%	±20%	±20%	±20%
Current Rating (Amps)	2.6 A	2.9 A	3 A	2.8 A
DC Resistance (DCR)	80 mOhm	90 mOhm Max	20 mOhm Max	80 mOhm Max
Shielding	Shielded	Shielded	Shielded	Shielded
Core Type	Drum Core, Wirewound	Drum Core, Wirewound	Drum Core, Wirewound	Drum Core, Wirewound
Core Material	Metal Composite	Metal Composite	Ferrite	Carbonyl Powder
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-40°C to 150°C
Inductance Test Frequency	100 kHz	100 kHz	100 kHz	100 kHz
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	Not specified	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant
Size / Dimension (L x W)	0.175" x 0.160" (4.45mm x 4.06mm)	0.160" x 0.171" (4.06mm x 4.35mm)	0.287" x 0.287" (7.30mm x 7.30mm)	0.175" x 0.160" (4.45mm x 4.06mm)
Height - Seated (Max)	0.047" (1.20mm)	0.047" (1.20mm)	0.177" (4.50mm)	0.047" (1.20mm)

Engineering Selection Recommendations

MPI4012V2-2R2-R (Eaton - Electronics Division)

This substitute maintains the same manufacturer lineage as the obsolete main part. It is classified as active product status with RoHS compliance. The part exceeds the current rating requirement at 2.9 A and maintains the same operating temperature range. DC resistance is specified at 90 mOhm maximum, which is within acceptable tolerance of the original 80 mOhm specification. Physical dimensions are nearly identical with 0.047" maximum seated height. This option provides direct manufacturer continuity for legacy design transitions.

SRP4012TA-2R2M (Bourns Inc.)

This substitute provides exact dimensional compatibility with the main part, matching both length and width at 0.175" x 0.160" (4.45mm x 4.06mm) and identical 0.047" seated height. Current rating of 2.8 A exceeds the 2.6 A requirement, and DC resistance matches at 80 mOhm maximum. The part carries AEC-Q200 automotive qualification and ROHS3 compliance. Operating temperature range extends to 150°C maximum, providing enhanced thermal margin. This option is optimal for applications requiring strict footprint compatibility.

B82472G6222M000 (EPCOS - TDK Electronics)

This substitute delivers superior electrical performance with 3 A current rating and significantly reduced DC resistance at 20 mOhm maximum. The part is ROHS3 and REACH compliant with active product status. However, physical dimensions are substantially larger at 0.287" x 0.287" (7.30mm x 7.30mm) with 0.177" seated height. This option is suitable only for applications where PCB layout can accommodate the larger footprint and where the improved DC resistance characteristics provide circuit performance benefits.

Frequently Asked Questions (FAQ)

Q: Can the MPI4012V2-2R2-R directly replace the MPI4040R1-2R2-R in existing designs?

A: The MPI4012V2-2R2-R maintains electrical compatibility with identical inductance, tolerance, and operating temperature range. Physical dimensions are nearly identical with maximum seated height of 0.047". The primary difference is DC resistance at 90 mOhm maximum versus 80 mOhm, which represents a 12.5% increase. Verification of circuit performance under this resistance change is required for applications with tight impedance specifications.

Q: What are the physical footprint constraints when selecting a substitute?

A: The main part uses a 1816 (4540 Metric) package with dimensions of 0.175" L x 0.160" W and 0.047" maximum height. The MPI4012V2-2R2-R and SRP4012TA-2R2M maintain these dimensions and are direct footprint replacements. The B82472G6222M000 requires a larger PCB footprint at 0.287" x 0.287" with 0.177" height and is not suitable for space-constrained applications.

Q: Are all substitute parts RoHS compliant?

A: The MPI4012V2-2R2-R is RoHS Compliant. The SRP4012TA-2R2M and B82472G6222M000 are both ROHS3 Compliant, representing the current RoHS standard. The original MPI4040R1-2R2-R does not specify RoHS status. All substitute parts meet current environmental compliance requirements.

Q: What is the significance of core material differences among the substitutes?

A: The main part uses metal composite core material. Substitute parts employ metal composite (MPI4012V2-2R2-R), ferrite (B82472G6222M000), and carbonyl powder (SRP4012TA-2R2M) core materials. Core material affects frequency response, temperature stability, and saturation characteristics. Selection should be based on circuit frequency requirements and thermal operating conditions specified in the application.

Q: Which substitute provides the best DC resistance performance?

A: The B82472G6222M000 provides the lowest DC resistance at 20 mOhm maximum, representing an 75% reduction from the original 80 mOhm specification. This characteristic reduces power dissipation and heat generation in the inductor. However, this part requires larger PCB space. The SRP4012TA-2R2M matches the original 80 mOhm specification while maintaining identical physical dimensions.

Q: What is the current saturation rating and why does it matter?

A: Current saturation (Isat) indicates the current level at which the inductor begins to lose inductance due to core saturation. The main part specifies 5.9 A saturation current. Substitutes vary: MPI4012V2-2R2-R at 4.2 A, B82472G6222M000 at 2.8 A, and SRP4012TA-2R2M at 3.5 A. Applications requiring operation near maximum current ratings must verify that the substitute's saturation current exceeds the circuit's peak current demand.

Q: Can the SRP4012TA-2R2M be used in automotive applications?

A: The SRP4012TA-2R2M carries AEC-Q200 automotive qualification and ROHS3 compliance, making it suitable for automotive applications. The extended operating temperature range of -40°C to 150°C provides thermal margin for automotive environments. The other substitutes do not specify automotive qualification.

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